This version of the documentation is archived and no longer supported. View thecurrent documentationto learn how toupgrade your version of MongoDB server. Note For details on specific operator, including syntax and examples, click on the specific operator to go to its reference page. ...
The MongoDB $and operator performs a logical AND operation on an array of two or more expressions and retrieve the documents which satisfy all the expressions in the array. The $and operator uses short-circuit evaluation
MongoDB $nor(not or ) operator If we want to fetch documents from the collection "testtable" which containing the value of "date_of_join" is "16/10/2010" and not containing the value of "age " either 19 or 22 or 23, the following mongodb command can be used : >db.testtable.fin...
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javascript node.js mongodb mongoose logical-operators Share Improve this question Follow asked Jul 8 at 6:23 Rya.M 111 bronze badge Add a comment 2 Answers Sorted by: 1 Why not execute a query based on the conditions like, let showAll = true; result = showAll...
MongoDB可以使用除geoHaystack索引之外的所有索引来支持$or子句。 $not和正则表达式 如果$or包含$text查询,则$or数组中的所有子句必须由索引支持。这是因为$text查询必须使用索引,而$or只能在索引支持其所有子句的情况下使用索引。如果$text查询不能使用索引,则查询将返回一个错误。
MongoDB干货篇之数据更新 1.1. 常用的函数 1.1.1. upsert 1.1.2. multi 1.2. 字段更新操作符 Field Update Operators 1.2.1. $set 1.2.2. $unset 1.2.3. $inc 1.2.4. $rename 1.3. 数组更新操作符 Array Update Operators 1.3.1. $ (query) 1.3.2. $push 1.3.3. $pull MongoDB干货篇之...
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